190 results about "Wireless bandwidth" patented technology

Device, system and method, in a vehicle communication system, to transmit wirelessly a message comprising the position, heading and speed of a vehicle or other moving object, wherein the transmission is repeated at regular intervals in a temporarily fixed time slot within a predetermined basic time interval. In a key embodiment the message duration is equal to or less than a predetermined time slot duration. Embodiments use generally the same time slot in a contiguous sequence of basic time intervals. Algorithms are described to resolve wireless interference within a time slot. Embodiments divide the basic time interval in multiple durations, “class regions,” for different message classes. Embodiments use different wireless bandwidth allocation algorithms for the class regions.

A system and method are disclosed for improved video transmission, particularly in security settings. An improved security controller combines the interfaces and functionality for high quality video delivery over often less-than-perfect wireless networks, multi-camera analog/digital video controllers and encoders, multi-frequency wireless camera support, connectivity for serial controllers, network switching, and distributed digital video recording with optional object and motion detection. The video transmission in enhanced using wireless adaptive video encoding, mobile viewing optimization, and wireless bandwidth improvement.

A system and method is provided for coordinating wireless bandwidth usage of a common frequency band by wireless nodes in two disjoint networks, such as an infrastructure (“IS”) network and an ad hoc (“AH”) network. When AH nodes move into the transmission range of an access point of the IS network, they register with the access point and listen to the access point to tell them when they are allowed to transmit data over a given transmission channel. The access point coordinates the bandwidth usage by broadcasting ad hoc mode poll signals to indicate that the ad hoc nodes may transmit over the channel, and sending infrastructure mode poll signals to indicate that a wireless node in the IS network can transmit over the given channel. The access point makes a fraction of the bandwidth available for communications by the wireless AH nodes in its transmission range, while guaranteeing the rest of the bandwidth for wireless nodes in the IS network.

Wireless networks and devices are ubiquitous today. For service providers to offer customers QoS and Service Level Agreements (SLAs) means in part providing resilient connectivity of wireless devices with good signal strength, good Signal to Noise and Interference Ratio (SNIR), and adequate useable bandwidth. Doing so requires that devices transmitting and receiving packets use over-the-air bandwidth efficiently and manage over-the-air congestion. According to embodiments of the invention QoS measurements and controls are incorporated only in the network (i.e. APs or controllers) and therefore QoS and SLAs can be achieved with all deployed client stations versus standards based approaches that require additional capabilities in network nodes, client stations and in most cases modifications to the applications. SLAs can be provided exploiting embodiments of the invention for traffic prioritization, capacity improvements through load distribution, and adjacent channel interference mitigation discretely or in combination with standards based mechanisms.

A method and system for managing wireless bandwidth resources include the capability to receive at a serving node a service request for a mobile unit and to communicate with a wireless network node to determine whether sufficient wireless bandwidth is available for the requested service. The method and system also include the capability to process the service request based on the availability of wireless bandwidth.

The invention provides Quality of Service assurances in a manner expected in other media to communications over paths that include one or more wireless links. The invention combines a subnet bandwidth manager (“SBM”) at an access point (“AP”) to track allocations of wireless bandwidth. The invention further incorporates multiple priority levels for packet transmission in a two-prong stochastic scheme. The first prong reserves bandwidth at each of the intermediate nodes in a transmission path subject to a veto by any intermediate node. The second prong modulates the transmission probability of a packet based on the previous failed attempts at transmission and the priority level of the packet. The overall result of this hybrid scheme is to not shut out users with the lowest priority, e.g., “best effort” priority, while assuring adequate bandwidth to higher priority applications.

With the rapid innovation in wireless technology, greater bandwidth is now available. This invention proposes to use the much greater wireless bandwidth available with ultrawideband (UWB) technology, to replace the current expensive solution for laptop port replication using hardwired connections. First, a wireless interface between the laptop and the port replicator will no longer require the expensive, high-pincount docking station connector currently in use in today's products. This will increase reliability of the docking system, and decrease cost of the solution. Second, a wireless dock will allow the laptop user to more quickly associate their computer with the docking station and connected peripherals merely by placing the laptop in proximity with the dock. Third, the bandwidth of the UWB wireless connection can be superior to that of a USB solution, with data rates exceeding 1 Gbps. When these advantages are combined, the UWB-powered docking station will offer a significant alternative to the current approach for laptop docking while protecting the customer investment in peripherals.

Wireless networks and devices are ubiquitous today. For service providers to offer customers QoS and Service Level Agreements (SLAs) means in part providing resilient connectivity of wireless devices with good signal strength, good Signal to Noise and Interference Ratio (SNIR), and adequate useable bandwidth. Doing so requires that devices transmitting and receiving packets use over-the-air bandwidth efficiently and manage over-the-air congestion. According to embodiments of the invention QoS measurements and controls are incorporated only in the network (i.e. APs or controllers) and therefore QoS and SLAs can be achieved with all deployed client stations versus standards based approaches that require additional capabilities in network nodes, client stations and in most cases modifications to the applications. SLAs can be provided exploiting embodiments of the invention for traffic prioritization, capacity improvements through load distribution, and adjacent channel interference mitigation discretely or in combination with standards based mechanisms.

A buffer monitoring section of the display device monitors a usage status of a buffer for storing video data, and transmits this usage status information to the tuner device. A remaining buffer time estimation section estimates a remaining time of video data within the buffer based on the usage status information of the buffer. A wireless bandwidth estimation section estimates the wireless bandwidth between the tuner device and the display device. A content bit rate control section controls a content bit rate of video data transmitted to the display device based on the estimated remaining time and wireless bandwidth of the video data. A content bit rate converting section changes the content bit rate of video data, and transmits the video data from the tuner device to the display device.

The invention provides a wireless bandwidth selecting method based on WLAN wireless bandwidth assessment. The wireless bandwidth selecting method based on WLAN wireless bandwidth assessment includes the steps that wireless access points of wireless signals are scanned and output within a preset time period; the number of the wireless access points with the first working frequency band and the wireless access points with the second working frequency band is counted; the intensity of the wireless signals output from other wireless access points around the main wireless access point is detected; a first channel bandwidth or a second channel bandwidth is automatically selected according to the number of the wireless access points with the first working frequency band and the wireless access points with the second working frequency band, and the intensity of the wireless signals output from the wireless access points, with the first working frequency band and the second working frequency band, around the main wireless access point. The optimal bandwidth can be selected automatically according to changes of surrounding wireless network environment; when surrounding wireless interference is strong, the bandwidth is automatically converted to be 40 MHz, and high-rate transmission is guaranteed; when surrounding wireless interference is weak, the bandwidth is automatically converted to be 20 MHz, and the basic wireless communication quality is guaranteed.

The invention relates to a method which is based on the technology of satellite differential positioning and inertial navigation, employs the data fusion and wireless bandwidth data communication, and achieves the precise positioning of a vehicle. The invention aims at effectively integrating various types of positioning navigation technologies, the data fusion and the wireless bandwidth data communication into a seamless positioning system suitable for intelligent traffic, providing real-time stable continuous position information for a sub-meter level to a centimeter level for a running vehicle, and achieving the lane-level positioning navigation of the vehicle. The technical scheme of the invention is that the method employs a reference station and a moving terminal, wherein the reference station is installed nearby a road, and consists of a satellite receiver of the reference station and a wireless bandwidth data communication module; the data is transmitted according to the demands of the moving terminal; the moving terminal is disposed on the vehicle, consists of the wireless bandwidth data communication module and a combined positioning system, can actively visit a plurality of reference stations for obtaining data to complete the multi-base-station differential positioning, and also can adjust the updating frequency of data transmission in real time.

The invention discloses a roaming switching and trigger method, an access control (AC) and an access point (AP), wherein the method comprises: the present AP of a mobile terminal access and signal quality information of a mobile terminal detected by the target AP are acquired; the difference value of which the signal quality of the mobile terminal detected by the present AP is lower than that detected by the target AP is judged to reach the set threshold value or not, if the difference value reaches the set threshold value, the mobile terminal is triggered to switch to target AP. The method of the invention ensures the service quality of users and increases the utilization rate of wireless broad band.

Methods and systems configured for on-the-fly detection of available wireless bandwidth and for on-the-fly adapting quality of videos to the available wireless bandwidth are disclosed. Techniques are also disclosed to facilitate the transition of video quality to minimize visual artifacts.

The invention discloses an indoor positioning method based on RSSI, and belongs to the mobile localization technology filed. The indoor positioning method based on the RSSI includes following steps: arranging three reference nodes, respectively arranging coordinates of the three reference nodes according to the arrangement of the nodes, and opening a switch of the reference nodes so as to enter into a monitoring mode; randomly placing an unknown node to be detected, setting a coordinate of the unknown node, and building a wireless sensing network; measuring value of signal intensity from the positions of the three reference nodes to the unknown node, transmitting the signal intensity value to a base station E which transmits the data value to a PC (personal computer); processing the receiving signal intensity value from the three reference nodes according to a proportion conversion method through the PC, and using the receiving signal intensity value after being proceed to confirm the coordinate position of the unknown node D. The indoor positioning method based on the RSSI has the advantages of saving hardware resources, and being low in time complexity, rapid in calculation method, high in positioning accuracy, low in allocation requirement for space wireless bandwidth resources, high in practical application value, and suitable for indoor environments which can not receive GPS signals.

Described is a method which includes receiving an association request from a first wireless device to establish an emergency connection via a wireless communications network. A wireless bandwidth availability required to grant the request is analyzed. When the bandwidth is unavailable, a wireless connection between a second wireless device and the wireless network is terminated and the request of the first device is granted.

Described is a system and method for optimizing throughput in a wireless network. The method comprises providing a predetermined wireless bandwidth on a wireless communication channel to a plurality of wireless nodes. A bandwidth used by a selected wireless node is analyzed. When the bandwidth is outside of a predetermined threshold range, a predetermined action is executed to adjust the bandwidth utilized by the selected wireless node.

The invention discloses a train-ground synergetic distributed network management system and method for a high-speed rail wide-band communication system. The train-ground synergetic distributed network management system for the high-speed rail wide-band communication system comprises an in-vehicle network management subsystem, a ground data relay station, a ground network management center and a management client, wherein the in-vehicle network management subsystem comprises a function management agent terminal, a management analysis processing module, a local database, a management southbound interface module and a management northbound interface module. According to the train-ground synergetic distributed network management system and method disclosed by the invention, aiming at the characteristic of the quick movement of a high-speed rail train, wireless bandwidth occupied by train-ground management information flow is reduced, and the high-efficiency reasonable management of the high-speed rail wide-band communication system is realized.

The invention discloses a method for adjusting transmission control protocol data transmission and a communicator. The method and the communicator overcome the technical detects in the prior art that transmission data amount and the size of transmission blocks between a server and the communicator and between the communicator and a mobile terminal can not be adjusted in real time according to changing of wireless transmission environment, and transmission bandwidth can not be adjusted dynamically. According to the method and the communicator, the data amount transmitted to the mobile terminal is adjusted accurately according to real-time changing of the quality of wireless transmission so that data loss and mistakes on the wireless transmission can be reduced, data re-transmission amount can be reduced, and wireless bandwidth can be utilized to the maximum. Changing of the quality of the wireless transmission is fed back to transmission between the server and the communicator in real time, the data amount sent by the server to the communicator is adjusted in real time so that meaningless data loss caused by buffering overflow and the like of the communicator is reduced, the data re-transmission between the server and the communicator is reduced, and transmission resources can be utilized to the maximum.

The invention relates to a video playing method based on a WAP gateway, a WAP gateway, and a system. The video playing method includes: an access request being judged by the WAP gateway, when the access request of a terminal browser is received by the WAP gateway; when the access request is a video playing request, obtaining video resources from a service providing server according to the video playing request; and sending the processed video resources to the terminal browser, after the video resources are processed. According to the video playing method based on the WAP gateway, the WAP gateway, and the system: a VO video processing module is added in the WAP gateway to carry out process flow such as compression, code conversion, and buffering, so that wireless bandwidth occupation is saved, and interaction and waiting time for providing a server for video service request; and a equalized distribution mechanism by polling is employed for forwarding a video request, code flow of a wireless channel is decreased at busy time and increased at free time, and meanwhile the code flow is adjustable according to the an attribute dynamic of a user, so that load on the gateway is relieved and video playing experience of the user is enhanced.